Propaquizafop interactions with herbicides used in rice tolerant to ACCase inhibitors

Mario, Rafaella B.; C. A. Neto, Roberto; Lucas, Tilio A.; Puntel, Simone; Bolson, Leonardo S.; Folharini, Pedro H.; Rossato, Gabriel R.; Ulguim, André R.

doi:10.51694/AdvWeedSci/2025;43:00011

Brazil

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RESEARCH ARTICLE • Adv. Weed Sci. 43 • 2025 • https://doi.org/10.51694/AdvWeedSci/2025;43:00011 linkcopy

Propaquizafop interactions with herbicides used in rice tolerant to ACCase inhibitors

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

An alternative for the control of weedy rice (Oryza sativa) and barnyardgrass (Echinochioa spp.) resistant to imidazolinone herbicides are acetyl coenzyme-A carboxylase inhibitors (ACCase) herbicides used in cultivar tolerant to these compounds. The objective was to evaluate the interaction of propaquizafop in tank mix with herbicides used in rice tolerant to ACCase inhibitors to control weedy rice and barnyardgrass. Two experiments were conducted, in the 2022/2023 season, in Dom Pedrito and Formigueiro. The hybrid XP739MA (MaxAce® technology) was used at both locations. The treatments were arranged in a 3x8+1 factorial design with factor A being rates of propaquizafop (0, 125 and 180 g ha^-1), and factor B tested herbicides carfentrazone, propanil, quinclorac, penoxsulam, florpyrauxifen-benzyl, bentazon, saflufenacil, and untreated control. The additional treatment was two applications of propaquizafop (125 g ha^-1). The analyzed variables were weedy rice and barnyardgrass control, rice injury, yield components and yield. The interactions were mostly additive for weedy rice and barnyardgrass control. The antagonism of the tank mixture of propaquizafop with quinclorac and florpyrauxifenbenzyl for barnyardgrass and with propanil for weedy rice reduced the yield components in Dom Pedrito. The interactions of propaquizafop with propanil were antagonistic and resulted in the lowest yield in Formigueiro. For this tank mix at the highest propaquizafop rate, yield decreased 14.6% more than at the 125 g ha^-1 rate. Tank mix of propaquizafop with other herbicides used in tolerant rice with MaxAce® technology can be used, increasing the weed control spectrum.

Keywords
Colby; Tank Mix; Antagonism; Additivity; MaxAce®

Active ingredient	Trade name	Manufactory	Formulation	g a.i. ha^-1
Saflufenacil¹	Heat	BASF	WG²	70
Bentazon¹	Basagran	BASF	SL³	1200
Florpyrauxifen-benzyl	Loyant	Corteva	EC⁴	30
Penoxsulam¹	Ricer	Corteva	SC⁵	60
Quinclorac¹	Facet	BASF	WP⁶	375
Propanil¹	Stam	UPL	WG²	2800
Carfentrazone¹	Aurora	FMC	EC⁴	40
Propaquizafop¹	Acert	ADAMA	EC⁴	125
Propaquizafop¹	Acert	ADAMA	EC⁴	180

Control (%)
Herbicides¹	Propaquizafop (g ha^-1)
	0	125		180
	Observed	Observed	Expected	Observed	Expected
10DAA
Untreated	0	90	-	95	-
Bentazon	0	80 ^ns	90	92 ^ns	95
Florpyrauxifen	5	86 ^ns	91	94 ^ns	95
Penoxsulam	0	94 ^ns	90	92 ^ns	95
Quinclorac	0	88 ^ns	90	93 ^ns	95
Propanil	0	53 *	90	74 *	95
Carfentrazone	10	89 ^ns	92	84 ^ns	95
Saflufenacil	4	87 ^ns	91	89 ^ns	95
20DAA
Untreated	0	95	-	96	-
Bentazon	0	94 ^ns	98	97 ^ns	99
Florpyrauxifen	0	96 *	99	91 *	99
Penoxsulam	0	97 ^ns	99	95 ^ns	99
Quinclorac	0	95 *	99	95 *	99
Propanil	0	88 *	98	93 *	99
Carfentrazone	0	94 *	99	93 *	99
Saflufenacil	0	94 ^ns	98	94 *	98
30DAA
Untreated	0	92	-	99	-
Bentazon	0	92 ^ns	92	96 *	99
Florpyrauxifen	0	98 ^ns	98	97 ^ns	99
Penoxsulam	0	92 ^ns	98	99 ^ns	99
Quinclorac	0	98 ^ns	98	96 ^ns	99
Propanil	0	72 *	92	79 *	99
Carfentrazone	0	93*	98	96 ^ns	99
Saflufenacil	0	98 ^ns	98	98 ^ns	99

Control (%)
Herbicides¹	Propaquizafop (g ha^-1)
	0	125		180
	Observed	Observed	Expected	Observed	Expected
10DAA
Untreated	0	99	-	99	-
Bentazon	0	99 ^ns	99	99 ^ns	99
Florpyrauxifen	0	99 ^ns	99	99 ^ns	99
Penoxsulam	0	96 ^ns	99	96 ^ns	100
Quinclorac	0	99 ^ns	99	90 ^ns	99
Propanil	0	58 *	99	50 *	99
Carfentrazone	0	99 ^ns	99	99 ^ns	99
Saflufenacil	0	99 ^ns	99	99 ^ns	99
20DAA
Untreated	0	97	-	100	-
Bentazon	0	97 ^ns	97	98 ^ns	100
Florpyrauxifen	0	97 ^ns	97	99 ^ns	100
Penoxsulam	25	86 ^ns	97	94 ^ns	100
Quinclorac	0	99 ^ns	97	99 ^ns	100
Propanil	0	75 *	97	50 *	100
Carfentrazone	0	99 ^ns	97	98 ^ns	100
Saflufenacil	0	99 ^ns	97	98 ^ns	100
30DAA
Untreated	0	93	-	98	-
Bentazon	0	95 ^ns	93	97 ^ns	98
Florpyrauxifen	41	97 ^ns	96	100 ^ns	99
Penoxsulam	0	93 ^ns	93	97 ^ns	98
Quinclorac	19	96 ^ns	95	99 ^ns	98
Propanil	0	40 *	93	63 *	98
Carfentrazone	0	97 ^ns	93	98 ^ns	98
Saflufenacil	0	99 ^ns	93	98 ^ns	98

Control (%)
Herbicides¹	Propaquizafop (g ha^-1)
	0	125		180
	Observed	Observed	Expected	Observed	Expected
10DAA
Untreated	0	90	-	96	-
Bentazon	0	90 ^ns	94	93 ^ns	96
Florpyrauxifen	80	95 ^ns	99	95 *	99
Penoxsulam	75	88 ^ns	97	95 ^ns	98
Quinclorac	73	81 ^ns	95	94 ^ns	97
Propanil	25	30 *	95	93 ^ns	96
Carfentrazone	13	91 ^ns	94	89 ^ns	96
Saflufenacil	0	94 ^ns	94	93 ^ns	96
20 DAA
Untreated	0	94	-	97	-
Bentazon	65	98 ^ns	97	95 ^ns	98
Florpyrauxifen	90	97 ^ns	99	97 ^ns	99
Penoxsulam	90	95 ^ns	99	95 *	99
Quinclorac	90	93 *	99	95 *	99
Propanil	85	45 *	95	90 *	99
Carfentrazone	58	95 ^ns	96	91 *	99
Saflufenacil	80	94 ^ns	99	93 *	99
30 DAA
Untreated	0	99	-	99	-
Bentazon	0	97 ^ns	99	97 ^ns	99
Florpyrauxifen	99	99 ^ns	100	97 ^ns	100
Penoxsulam	89	96 ^ns	100	97 ^ns	100
Quinclorac	92	93 ^ns	100	98 ^ns	100
Propanil	70	70 *	100	91 *	100
Carfentrazone	0	95 ^ns	99	99 ^ns	99
Saflufenacil	0	99 ^ns	99	98 ^ns	99

Control (%)
Herbicides¹	Propaquizafop (g ha^-1)
	0	125		180
	Observed	Observed	Expected	Observed	Expected
10DAA
Untreated	0	99	-	99	-
Bentazon	0	99 ^ns	99	99 ^ns	99
Florpyrauxifen	45	99 ^ns	99	99 *	99
Penoxsulam	3	90 ^ns	99	90 ^ns	99
Quinclorac	58	80 *	100	75 *	100
Propanil	5	40 *	99	43 *	99
Carfentrazone	5	98 ^ns	99	99 ^ns	99
Saflufenacil	5	97 ^ns	99	99 ^ns	99
20 DAA
Untreated	0	99	-	100	-
Bentazon	0	97 ^ns	99	97 ^ns	100
Florpyrauxifen	55	98 ^ns	100	98 ^ns	100
Penoxsulam	32	87 *	99	90 ^ns	100
Quinclorac	64	91 ^ns	100	89 *	100
Propanil	14	43*	99	31 *	100
Carfentrazone	0	99 ^ns	99	98 ^ns	100
Saflufenacil	3	98 ^ns	99	99 ^ns	100
30 DAA
Untreated	0	100	-	100	-
Bentazon	0	100 ^ns	100	100 ^ns	100
Florpyrauxifen	90	100 ^ns	100	100 ^ns	100
Penoxsulam	13	94 ^ns	100	100 ^ns	100
Quinclorac	77	100 ^ns	100	100 ^ns	100
Propanil	13	70 *	100	21 *	100
Carfentrazone	0	100 ^ns	100	100 ^ns	100
Saflufenacil	0	100 ^ns	100	100 ^ns	100

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[TFN1] ¹ Mineral oil adjuvant added in a 0.5 v/v. ² dispersible granules; ³ soluble concentrates; ⁴ emulsifiable concentrates; ⁵ suspension concentrates; ⁶ wet-table powders